--- a/mercurial/util.py Mon Dec 18 21:15:53 2017 +0900
+++ b/mercurial/util.py Wed Dec 20 02:13:35 2017 -0800
@@ -163,6 +163,10 @@
setprocname = osutil.setprocname
except AttributeError:
pass
+try:
+ unblocksignal = osutil.unblocksignal
+except AttributeError:
+ pass
# Python compatibility